Thread: td5 dies with more than 1/3 throttle

Is that just when under load or all the time. I.e . does it cut out at no more than 1/3rd throttle in neutral.

Can you hear the fuel pump start when the ignition is turned on? You may have to put your head in the off side rear wheel arch when someone turns the ignition on.

When driving (if possible) if you dont use more than 1/3rd throttle will it rev through?

If so it may be the throttle pedal as opposed to a fuel pump.

Originally Posted by josh aka sean

Hi all
I have just purchased a 2000 discovery td5. As the title suggest its runs fine until more than 1/3 throttle is given and then dies. I am assuming it is a fuel delivery problem at this stage but not sure where to start. Any suggestions would be good
Thanks
Josh

Discos don't have a throttle cable between pedal and injection system as they have a 'fly-by'wire' system. The potentiometres (Spelling) and throttle position sensors sometime fail giving erratic throttle 'settings similar to what you describe.

I don't suspect it's a fuel pump issue - they either work of fail totally.

I agree with Psimpson7 - have a dealer do a diagnostic check. They'll tell you within 5 minutes if its throttle pedal.....or get hold of a Nanocom and fault find.

Cheers

Sometimes a TPS will develop a dead spot which can be pushed past if you're quick enough. I had one that had a dead spot just off idle which was "different" to drive in stop-start Canberra traffic using the all or nothing approach.

Originally Posted by Graeme

Sometimes a TPS will develop a dead spot which can be pushed past if you're quick enough. I had one that had a dead spot just off idle which was "different" to drive in stop-start Canberra traffic using the all or nothing approach.

Yes the traffic in our National Capitol of Public Servants can be........"challenging"

Particularly the Consulate plated vehicles that quite often forget that we drive on the LHS of the road!! It's a challenge to find a car driving around a round-a-bout the wrong way.....numerous times until they finally work it out

Check the sense line between the air intake and the turbo waste gate controller.
It's a small black rubber hose that runs from just behind the air filter box from a stub on the air intake assy. The turbo waste gate controller lives near the aircon pump.

If this line is removed or split you will see these issues. It can happen during servicing if the mechanic is not paying attention.

If you need more info then ask and I cam sure a photo will turn up.

Hope this helps.

Sorry I haven't replied. Thanks for all the suggestions. I forgot to mention earlier that the vehicle is currently in Victoria at a relatives house (while i'm in cairns) so have to relay information to them to have a look at for me and then get back to me. At the moment I'm in the stages of waiting for them to get back to me. Thanks again for the suggestions.
Cheers
Josh

Hi again
It appears that it is rev related. If held on brakes and full throttle is applied will hold low revs. I may have been miss leading with the statement that it dies (miss understanding over the phone) it apparently surges heavily. further to this did have the fuel filter light come on briefly for around 10 sec and has since gone off again. We are currently going to change the fuel filter but any other suggestions would be appreciated.
Sorry for the vague information i've provided so far.
Cheers
Josh

sounds like the problem i had on a td5. the dealer fitted a turbo boost valve for $133 a year or so ago